Vapor-burner.



No. 7I3,849. Patented Nov. I8, |902. J. H. BULLARD.Y

VAPUR BURNER.

(Application led Nov. 25, 1901.) (No Model.)

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JAMES H. BULLARD, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE OVEBMANAUTOMOBILE` COMPANY, OF CHICOPEE, MASSACHUSETTS, A

CORPORATION.

VAPOR-BURNER.

SPECIFICATION forming part of Letters Patent N o. 713,849, datedNovember 18, 1902. Application filed November Z5, 1901. Serial No.83,594. (No model.)

T0 all whom, it may concern:

Be it known that l, J Anas H. BULLARD, a citizen of the United States ofAmerica; residing at Springiield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in Vapor-Burners, of which the following is a specification.

This invention relates to the construction of burners for gas and airmixtures or for hydrocarbon vapors, the burner being of that type inwhich the combustible is delivered under more or less pressure in theform of jet into the open end of a pipe leading into the burnerbody,whereby a certain volume of air is drawn into said pipe by the jet, themixture passing out of the burner-body through small apertures therein.In the use ot' burners of this description in certain classes of work itis desirable and in many cases essential that the iiames arising fromthese apertures should make their exit with sufcient force to extend theilame vertically above the latter to a considerable distance. It hasbeen found in practice that this end can only be attained by an increasein length of the inletpipe outside the burner, unless a pressure isapplied behind the jet of combustible of such force as to make theburner noisy in operation,and a high pressure involves the expenditureof considerable power to produce it. Furthermore, when vaporizedhydrocarbons are burned, if the flame becomes extinguished by a pu ofair or other cause, the continued delivery of the vapor into theburner-body will result in the deposit therein of condensed hydrocarbon,which will take fire when an attempt is made to relight the burner, theresult being an uncontrollable tire of considerable volume untilit hasburned itself out.

This invention has for its object the production of a burner whereby theflame may be projected above the surface of the burner without anincrease of pressure, whereby the burner would be noisyin operation, afurther object being in the provision of means whereby liquidhydrocarbon cannot accumulate in the burner-body.

Still another object is to provide means for adjusting the length of theinlet-tube of the burner,whereby the height of the flame above theburner may be regulated.

In the drawings forming part ot this application, Figure lis a sectionalelevation of a burner having an inlet-tube therein, the outer end ofwhich is doubled under the burner. Fig. 2 is a View of the outside ofthe burner, looking into the end of the inlettube. Fig. 3 is anotherelevation of the burner, showing the inlet-pipe extending outwardly ofthe burner. y

Referring to the drawings, the burner is indicated by a and is of thattype in which the body constitutes a flat shallow box having air-supplytubes l) extending vertically through it, and around the upper ends ofwhich apertures are made through the top plate of the burner for theexit of the combustible mixture. These apertures are not shown in thedrawings, as this part of the burner construction forms no part of theinvention, but is illustrative only of a kind of burner that may be usedand of which there are a number of variations, any one of which wouldanswer as Well as this one.

Through the side wall ot' the burnerthe inlet-pipe cis introduced.Ordinarily this pipe extends only a short distance outwardly of theburner and has located opposite its open end the jet-nozzle d. Thisinlet-pipe varies in internal length in different burners, and as far asthis invention is concerned its length inside the burner-body isimmaterial. The end of this inlet-pipe c within the burner-box isclosed. As ordinarily constructed, with its open end terminating closeto the side of the burner, the flame can only be projected away from thetop plate of the burner by the use of so much pressure behind the jet ofgas or vapor that the burner is rendered very noisy. This is a greatdisadvantage in the use of the burner for the boilers of steam-propelledroad-wagons.

I have found as a result of extended experiment that by varying thelength of the inletpipe outside the burner according to the volume ofthe jet of combustible and the crosssectional area ot the pipe theheight to which the dame may be projected above the top IOO plate of theburner may be varied to a considerable degree without any change of theother conditions.

In powerpropelled road-wagons it is inconvenient to have the inlet-pipeextend outward in a straight line from the burner, for it would projectbeyond the side of the Vehicle too far, it being understood that the jetis, for convenience sake, located at the side to permit easy access toit for adjustment. Therefore I prefer to double back the pipe on itselfand a little to one side of that portion thereof in the burner-body, asshown in Fig. 2. This arrangement brings the bell-shaped mouthpiece f ofthe pipe in such position that the jet may be located, as usual, justinside the body of the vehicle.

Preferably, though not necessarily, the portion of the inlet-pipelocated outside of the burner is provided with a longitudinally-slidablepart g, consisting merely of a length of pipe similar to the pipe c, butof suiiciently greater diameter to slip over the other portion of thepipe. This telescoping section has the usual flaring end. When thisconstruction is employed, it is of course necessary to provide foradjusting the jet toward and from the mouth of the inlet-pipe, and thismay be done in any convenient manner. A set-screw h, if desired, may belocated in the extensible end g of the inlet-pipe to secure it in anydesired position. By means of this member g of the inlet-pipe an exactregulation of the flame may be made in amoment.

' A further advantage in extending the pipe c back-under the burner isthat there is thus provided a sure means of preventing the burner-bodyfrom filling up with condensed hydrocarbon on account of the differencein the level of the entrance portion of the pipe c relative to thatportion of it in the burner. When this latter part of the pipe extendsinto the burner, as shown, the inner end thereof is closed and the sidesthereof are perforated with holes t', drilled through the Wall of thepipe well above the bottom, as shown. By this means the gas or vapor isuniformly distributed throughout the burner.

When the location will permit, the pipe c may extend outward from theburner, as shown in Fig. 3, and slightly downward toprovidefortheproperdrainagethereof. This last-named figure shows thepipe c made Without the telescopin g portion g. Where no variation ofthe height of the liame is desired, this part of the pipe may beadjusted to produce the iiame desired during the process of manufactureof the burner.

Y Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

l. A burner comprising a box-like structure for the reception of gaseousor vaporized combustible, there being air-passages extending throughsaid structure transversely; an inletpipe having a closed end extendinginto and partially through said structure, and having openings only inthe sides thereof above the bottom of the pipe, the outer portion of thelatter being bent back under said structure and extending thereacross,and having an open end located beyond the side of the burner.

2. Aburnercomprisingabox-likestructure for the reception of gaseous orvaporized combustible, there being air-passages extending through saidstructure transversely; an inletpipe having a closed end extending intoand partially through said structure, and having openings only in thesides thereof above the bottom of the pipe, the outer portion of thelatter being bent backward upon that portion of the pipe Within theburner, and in a lower plane, and having an open end located outside ofthat part of said burner in which said air-passages are located.

3. Aburnercomprisingabox-likestructure for the reception of gaseous orvaporized combustible, there being air-passages extending through saidstructure transversely; an inletpipe having a closed end extending intoand partially through said structure, and having openings in the sidesthereof above the bottom of the pipe, the outer portion of the latterbeing extensible and being bent backward upon that portion of the pipeWithin the burner, and in a lower plane, and having an open end locatedoutside of that part of said burner in which said air-passages arelocated.

JAMES H. BULLARD.

Witnesses:

WILLIAM I-I. CHAPIN, K. l. CLEMoNs.

